Add new object logical external schema (DESD)

file-formats/desd/README.md

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+# DESD File Format
+
+File | Cardinality | Definition | Schema | Example
+:--- | :---  | :--- | :--- | :---
+`<name>.desd.json` | 1 | [`zif_aff_desd_v1.intf.abap`](./type/zif_aff_desd_v1.intf.abap) | [`desd-v1.json`](./desd-v1.json) | [`z_aff_example_desd.desd.json`](./examples/z_aff_example_desd.desd.json)

file-formats/desd/desd-v1.json

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+{
+  "$comment": "This file is autogenerated, do not edit manually, see https://github.com/SAP/abap-file-formats for more information.",
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/SAP/abap-file-formats/blob/main/file-formats/desd/desd-v1.json",
+  "title": "CDS Logical External Schema",
+  "description": "CDS logical external schema",
+  "type": "object",
+  "properties": {
+    "formatVersion": {
+      "title": "Format Version",
+      "description": "Format version",
+      "type": "string",
+      "const": "1"
+    },
+    "header": {
+      "title": "Header",
+      "description": "Header",
+      "type": "object",
+      "properties": {
+        "description": {
+          "title": "Description",
+          "description": "Description of the ABAP object",
+          "type": "string",
+          "maxLength": 60
+        },
+        "originalLanguage": {
+          "title": "Original Language",
+          "description": "Original language of the ABAP object",
+          "type": "string",
+          "minLength": 2
+        },
+        "abapLanguageVersion": {
+          "title": "ABAP Language Version",
+          "description": "ABAP language version",
+          "type": "string",
+          "enum": [
+            "standard",
+            "cloudDevelopment"
+          ],
+          "enumTitles": [
+            "Standard",
+            "ABAP Cloud Development"
+          ],
+          "enumDescriptions": [
+            "Standard",
+            "ABAP cloud development"
+          ],
+          "default": "standard"
+        }
+      },
+      "additionalProperties": false,
+      "required": [
+        "description",
+        "originalLanguage"
+      ]
+    },
+    "generalInformation": {
+      "title": "General Information",
+      "description": "General information",
+      "type": "object",
+      "properties": {
+        "defaultRemoteSchemaName": {
+          "title": "Default Remote Schema",
+          "description": "Default remote database schema name when configuring the connection details of logical external schema.",
+          "type": "string",
+          "maxLength": 256
+        },
+        "usesRouting": {
+          "title": "Uses Routing",
+          "description": "If true, the logical external schema can only be used in routed scenarios.",
+          "type": "boolean"
+        }
+      },
+      "additionalProperties": false
+    }
+  },
+  "additionalProperties": false,
+  "required": [
+    "formatVersion",
+    "header"
+  ]
+}

file-formats/desd/examples/z_aff_example_desd.desd.json

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+{
+  "formatVersion": "1",
+  "header": {
+    "description": "Example DESD for ABAP file format",
+    "originalLanguage": "en"
+  }
+}

file-formats/desd/type/zif_aff_desd_v1.intf.abap

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+INTERFACE zif_aff_desd_v1
+  PUBLIC.
+
+  TYPES:
+
+    "! <p class="shorttext">General Information</p>
+    "! General information
+    BEGIN OF ty_general_information,
+      "! <p class="shorttext">Default Remote Schema</p>
+      "! Default remote database schema name when configuring the connection
+      "! details of logical external schema.
+      default_remote_schema_name TYPE c LENGTH 256,
+      "! <p class="shorttext">Uses Routing</p>
+      "! If true, the logical external schema can only be used
+      "! in routed scenarios.
+      uses_routing               TYPE abap_bool,
+    END OF ty_general_information,
+
+    "! <p class="shorttext">CDS Logical External Schema</p>
+    "! CDS logical external schema
+    BEGIN OF ty_main,
+      "! <p class="shorttext">Format Version</p>
+      "! Format version
+      "! $required
+      format_version      TYPE zif_aff_types_v1=>ty_format_version,
+      "! <p class="shorttext">Header</p>
+      "! Header
+      "! $required
+      header              TYPE zif_aff_types_v1=>ty_header_60_cloud,
+      "! <p class="shorttext">General Information</p>
+      "! General information
+      general_information TYPE ty_general_information,
+    END OF ty_main.
+
+ENDINTERFACE.

file-formats/desd/type/zif_aff_desd_v1.intf.json

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+{
+  "formatVersion": "1",
+  "header": {
+    "description": "ABAP file format of DESD objects",
+    "originalLanguage": "en"
+  }
+}